Winding machine



March 20, 1951 Filed April 5, 1948 J. A. TRUlTT 2,545,534

WINDING MACHINE 7 Sheets-Sheet 1 INVENTOR.

L JOSEPH A. TRU/TT I I BY I March 1951 J.-A. TRUITT 2,545,534

WINDING MACHINE Filed April 5, 1948 7 Sheets-Sheet 2 INVENTOR. JOSEPH A.TRU/TT March 20, 1951 TRUlTT 2,545,534

WINDING MACHINE Filed April 5, 1948 7 Sheets-Sheet 3 II K INVENTOR.JOSEPH A. THU/T7 March 20, 1951 J. A. TRUITT 2,545,534

- WINDING MACHINE Filed April 5, 1948 7 Sheets-Sheet 4 INVENTOR. JOSEPHA. TRU/TT March 20, 1951 Filed April 5, 1948 J. A. TRUITT 2,545,534

WINDING MACHINE '7 Sheets-Sheet 5 INVENTOR.

JOSEPH A TRU/TT March 20, 1951 A. TRUlTT WINDING MACHINE '7 Sheets-Sheet6 Filed April 5, 1948 INVENTOR. JOSEPH A- TRU/TT March 20, 1951 A, TR2,545,534

WINDING MACHINE Filed April 5, 1948 7 Sheets-Sheet 7 IN VEN TOR.

" JOSEPH A. TRU/TZ' Patented Mar. 20, 1951 UNITED STATES PATENT OFFICEWINDING MACHINE Joseph A. Truitt, West Chester, Pa., assignor to-American Viscose Corporation, Wilmington, DeL,v a-corporationsofDelaware.

Application April 5, 1948,-Serial'No,-1 9,013

rate or which should be withdrawn from the As an example of supply at aconstant rate. the first situation, the take-upmay be of yarndischarged, in wet'or'dry condition, from a machine for producingartificial filaments in a continuous manner As an example or the latter,the constant withdrawal by the take-up may be" of yarn froman up-twisterin order to introduce uniform twist. In allof these'various situations,the w-inding system employed is preferably of the ,precise wind typeinwhich there is a'consta'nt relationship between the angular speed ofrotation of the spindle and the frequency of traverse of the yarn asit'i's taken-up in the package.

Aiurtherspecific objectof the invention is to provide a new mechanismfordriving the traverse guide at a frequency which is controlled inrelation to'the angular speed of rotation of the spindle, tobe---constant' or varied in a predetermined manner throughout thediameter of the package. Theva-riation, in a preferred'instance, can-becontroll'ed to provide a constant helix angle between adjacentsuperimposed convolutions to provide improved flow of liquor through thepackage in liquid treatments thereof, such as washing," dyeing,bleaching, etc., and improved filtering action.

In general, the present invention utilizes a magnetic drive for rotatingthe-winding spindle at the desired speed. It comprises a rotatablemember carrying one or more magnetizable elements and a s'econdrotatablemember carrying one or more magnetic elements opposite the magnetizableelement or elements; one member is secured to the winding-spindle andtheother is. arranged to be driven by an outside power source, so thatwhenlthe latter member is rotated, such as by: an electric: motor, theother member and the spindle arerotated at a, pre* determined speed anda predetermined-torque which may be maintainedconstant throughout 12Claims. (Cl. 242-18) the Winding: or may be'varied in a, predeterminedmanner by; varying the air gap between the magnetizablei elements andthe magnetic elements:

Alternately, the: first rotatable member may carry magnetic elements andthe second may carry magnetizable elements. Again,. each; rotatablemember may carry both magnetic and, magnetizablel elements. The air gapmay-be varied. by axially shifting one: or. both of: there-z tatable'members, which'may' take the form oi ccaxially mounted adjacent: discs,or concentrically relatedrings, cylindrical. or conicahone sur-.rounding the: other. H

In the. drawing; illustrative Of the invention,

. Figure '1 is: a. front: elevation of a winding ma-' chine embodyingthe presentinvention,

Figure Z-is. aside elevation-of the windinglmachineshownin Figure 1,

Figure 3 is a plan view ofthe. embodiment of 20 Figure- 1,

Figure 4 is a wiring diagram forthe embodiment of Figure 1,.

Figure 5 is a front elevation-of a secondizemt bodim'ent;

Figurefi is a side elevationof the second-cub: bodiment,

Figure 7 is -aplanmie'w of the second embodis ment,

Figure 8:is aside elevation of a third embodiment, and I a Figure 9 ice;detailedview of part ofthe third embodiment. 4

' While the invention-willbe described herein:- a fter in-relation to awinding machine for produoing cone-shaped packages, it is to beunderstood that it is not limited-theretoa --Referring to theemb'odimentof Figures-l to e of the'drawing, reference numeral 2d'esignates the fixed main frame of the machine. At the topof frame 2, arotating-spindle 3 is journaled in-suita'ble bearings and is adaptedtobedriven by means hereinafter described. The" spindle is adapted toreceive a cone or cop tube 4' upon which the-package5 is'to' bewound.

A shaft 6 is journaled in the frame 2' and'ex tends in a directionparallel to the winding spindle 3.: This shaft 6. is connected to' thespindle and. is driven therefrom by suitable means, suchas gears 62, 6aand 6b. The shaft" 6 also carries a helicalgrooved. cam l for rotationtherewith. g A traverse frame 8' is pivotally mountedupo-n the: shaftfi' upon which it is suitably balanced such, as by the-counterweight 9-.This traverse frame 8 is, provided: with a backing plate l0 and aporcelain bail l I may be rotatably supported on a wire l2 whosedepending legs adjacent the ends of the bail are suitably fastenedwithin recesses in the plate In by means of set screws l3. The traverseframe 8 is constructed to provide a horizontal groove through which atraverse bar 14 may reciprocate. A thread guide l5, whose upper end isadapted to press lightly against the package being Wound is fastened toone end of the traverse bar l4 for reciprocation therewith. The otherend of the traverse bar l4 is provided with a head i6 having a dependingpin or roller l7 adapted to engage the groove in the helical cam i. Asthe package builds up, it gradually swings the traverse frame 8 awayfrom the spindle 3 and the traverse frame is prevented from swingingback toward the spindleby means of a lever l8 having one end fastenedthereto at 19 and the other end engaging within a groove formedunderneath a segment 20 which is pivotally fastened to the main frame 2at 2 l.

The operation of the winding machine is initiated by a starting lever orhandle 22, mounted on one end of a stud 23 pivotally mounted near thetop of the main frame 2. A lever 24 adjacent the starting lever 22 ismounted fixedly on the rod 23 so that it rocks therewith but there issome play between lever 22 and the lever 24, which play is taken up by aspring 2211 which. normally urges lever 22 in a counterclockwisedirection relative to lever 24. One end of lever 24 is normally biassedin a counterclockwise direction by a spring 25 fastened to the frame 2and is provided with a braking means 26 which is adapted to pressagainst the spindle 3 and to stop the rotation thereof when the lever 22is in the stop position. The other end of the lever 24 is formed as acurved arm having a hook 21 at its end. When the starting lever 22 isswung into operating position, brake 25 is lifted from the spindle (asshown in Figure 1), lever 22 makes electric contact with a springterminal 24a (closing a starting circuit for the driving motor) and thehook 2'1 engages another hook 28 secured to orconstituting part of thepivoted segment 20. The machine may be maintained in running position bysetting these hooks 2'1 and 28 in opposition to the spring 25 whichotherwise would tend to' set :the brake and to swing the starting lever22 into the stop position. The pressure exerted by the guide against theexterior winding of the package is controlled by, a, counterweighted arm29 pivotally mounted on a bracket 30 fastened to the frame 2 of themachine. The link 3| is connected to arm 29 a short distance from itspivotal axis and is connected to the traverse frame 8 at 32. Foradjustment, the end of link 3| may be inserted into any one of a seriesof sockets 33 provided. It will be seen that as winding proceeds arm 29swings in acounterclockwise direction and that this swinging of thecounterweight causes a gradual decrease of the force exerted by link 3!in opposition to the turning of the traverse frame 8 in a clockwisedirection.

In operation of the machine, the yarn coming from a stationary package,from an up-twister, from the last stage of a continuous spinningmachine, or from any other source passes first over the guide 38a, undera break or exhaustion detector 38, over the porcelain bail II andthrough the traverse guide 15 to the package. The break detector 38comprises a device pivotally mounted at 39 upon segment 20. The deviceis composed of two arms 40 and 4|, one of which 40 extends toward awheel 42 having numerous projections or ridges 43 thereon mounted uponthe cam shaft 6 for rotation thereby. The other arm 4| is bent to form ahorizontal extension 44 adapted to ride upon the yarn and along whichthe yarn may traverse to a certain extent. The extension 44 may be bentat the end to form a hook 45 to prevent the yarn from accidentallyslipping out of engagement therewith. The first arm 40 is of such lengthand the entire detector device 38 is so balanced that upon breakage ofthe yarn, the device swings in a clockwise direction to bring arm 40into the path of the projections 43 upon the rotating wheel 42 which inturn forces the segment 25 in a counterclockwise direction sufficientlyto release the two hooks 27 and 23 and thereby permit the spring 25 tothrow the starting lever 22 into the stop position to apply the brake.Also, when arm 49 swings into the way of projections 43, it makeselectric contact with a terminal 45a, which energizes a relay foropening the electric circuit to the driving motor, asv will be explainedhereinafter.

The arm 40 of the breakage detector is independently pivotally supportedat 4 3 on the pivotal mounting 49 upon which the other arm 4| is fixedlysecured. A screw-50 secured to the pivotal mounting 49 of the end;breakage detector serves as a rest for the arm 48 to limit itscounterclockwise'motion with respect to the pivotal mounting 42 of theend breakage detector.

In the form of the invention shown in Figures 1 to 4, an auxiliary arm5| suitably secured to arm 29 for swinging motion therewith has aportion 52 arranged to engage arm 453 and to swing it into the path ofthe projections 43 when the predetermined size of package is attained,whereupon stoppage of the machine is effected. The arm 5! may be securedto arm 29 by means of a bolt 53, adjustability being provided for by aslot 54 in arm 29. The arm 5i also may be provided with an indicatorcomprising the pointer 55 adapted to cooperate with the scale 55 uponthe arm 29. The scale may be graduated to correspond with the sizes ofpackages that would be attained upon setting the pointer to the severaindicia thereon.

Reference to the drawing will show that the application of the auxiliaryarm 5i to arm 29 may readily be compensated for merely by an adjustmentof the counterweight on the arm 29.

The magnetic driving means which constitute the most important featureof the present invention comprises the rotatable member carrying one ormore magnetizable elements or magnetic elements Bl secured therein.Though member 55 can be made entirely of magnetizable material andmagnetized with the proper number of poles, the main body of therotatable member Bil is preferably of non-magnetic material, i. e., amaterial which is substantially uninfiuenced by the relative movement ofa magnetic field with respect thereto. When a plurality of elements 5!are provided they are preferably provided in pairs or ineven--numbers--for example, 2; 4, 6., 8, l2, I6, 24 or more, in whichevent they are disposed with magnetic poles alternating symmetricallyabout the axis of the rotatable member 60. If a single magnetizable ormagnetic element BI is preferred, it may constitute a continuous annulusabout the member. The external periphery of the member 60 may beprovided with gear teeth as 52 which mesh with gear 6a.

The rotatable member 60 is connected to the spindle-e for rotationtherewith and for axial sliding motion therealong and, for thispurpose,- the shaft 3 is provided with splines or ridges 83 which fitslidabl-ywithin the sleeves 64 and 65 secured together by screw threads66.- A key El secures the member till to the sleeve 65.

I Means isprovided for axially moving themember 63 relativetothespindIe-BL This means comprises a ring 68: (Figure 3) fitting withinanannular recess provided in'the outer peripheryof the sleeves 64 and65.- The ring 68" is provided with two diametrically opposed pins 69.which project through-slots l and H in the bearing 12- and annularyokeor cam 13 fitting slidably' therearounds The slots within thebearing 12 extend axially, whereas the cam" slots 3! in the yoke 3- areeach provided witha projecting lug M te which ispivotally' secured alink 15 (Figures 2=and3)".- The link 'i5 is pivotally connected to alever 76 which carries an adjustable clamp 76 having a bore forpivotally receiving the pin Il upstanding from '58 to provide a fulcrumfor lever 16. One end of lever 16 projects into the path of a rod 79(whichmay be described as a cam-rod because of its function) securedtothe traverse frame just back of one end of the bail wire l2 (seeparticularly Figure 2). The lever 76-- is also slotted at 80 to receivea pin 8| carried by a reciprocable core 82 operated by the solenoid coil83. A spring 84 normally urges lever 16 toward the coil and a'boreprovided in an ear 85 projecting upwardly from the frame I8 serves toguide the rod 82. The core 82- has its magnetic center displaced on theside of the coil 83 away from lever. 16 so that when coil 83 isenergized, it imparts clockwise motion to lever 16 as viewed in Figure3, overcomingspring 8 1, and pressing lever 16 against rod 19.

Opposite the rotatable member so is disposed the rotatable member 86which may be similar in construction, being provided with one or moremagnetic elements or magnetizable elements 8?, corresponding innumberand disposition-to the elements SI of the member 69. When elements 6|are of magnetic material, elements 8'! are of magnetizable material, orvice versa The e1ementor elementsfi-l or 81 may be of any mag netizable:material, such as soft iron, cobalt, nickel, or alloys thereof, .but apreferred alloy is that known asAlnico one type of which consists.circuitstherefor, or of permanent magnetic material, such as magnetizedsteel, cobalt, nickel, or other alloys thereof such as those. known asAlnic'o and Cunico. In the preferred instance,

, particularly when the Alnico alloy mentioned hereinabove is used inthe other elementor elemerits, the alloy known as Cunico consisting ofA. 0. line 95 having two of the lead lines: c'orinectable to the motor93' by means-of the contactsvv 9e and 9? respectively, the third Phasebeing grounded as shown. The core 98' carrying contacts 96, 96a, 9'! and99 which are normally open,

[63' and IE4 the starting lever 22 and contact- 24a are disposed. Thenormally closed contact I05 is provided between branch lines I06 andllll. The line i0! is arranged "to be connected in series with line I08connected to one I terminal of the motor by means of contact 99.

% copper, 21% nickel. and 29% cobalt may be 7 Figure 4 illustratesdiagrammatically an elec-- trio circuit for interconnecting the variouselemerits of this embodiment of the invention. It shows asource ofcurrent, such as a three-phase 16 against rod l9.

The coil 83'is connected to one of the lines 95 and through contact 96ais adapted to be connected through lead line ID -la to another of thelines" 95;

The arm 46 which is responsive to thread exhaust, breakage and also tocompletion of thepackage, is connected by line I09 to one of the powersupply lines, whereas the terminal 40a is connected by a line III tocoil HZ of the relay which controls contact I05. Coil 2a is connected byline 5 I3 to another line of the power supply.

The operation of'this embodiment is as follows:

In starting the machine, the operator swings operator has secured the mg21 under the latch 28, he is free to release lever 22 which is caused tobreak contact with terminal 2 3a because of spring 22a. Contact 99maintains the current in the holding coil I09 and contact 96a maintainscurrent in coil 83, thereby holding lever During operation of the motor,the rotatable member is in close position to the rotatable member byvirtue of the coil 83 urging lever 16 into contact with rod 19 carriedby the traverse frame. As the package builds up, however, the swingingof the rod 79 causes lever 16 to swing in a counter-clockwise directionas viewed in Figure 3 which causes the ring 13 to rotate about thebearing sleeve 12 and shift the member 6!] away from member 85. Theextent of this shift can be predetermined by pre-selecting thecurvatureof rod '39 (that is, by replacing a straight rod 19 with one having anydesired curvature along its line of contact with the lever 16) and/or bythe adjustment of the location of pivot H by the set screw Tl.

By this means, it is possible to vary the gap between the magnetizableelement 6! and the magnetic element 81. By so varying the gap, thetension exerted upon the strand as it is drawn to the package over guidel5 can be controlled in a predetermined manner. This result is obtainedby virtue of the slip or diiference in speed of rotation between thedriven member 6!! and the driving member 86 which are coupled by themagnetic fields therebetween. Less slip is obtained when the gap islessened so that, as the winding builds up and the diameter of thepackage requires a slower speed of rotation, if it is desired tomaintain an approximately constant tension, it is necessary to widen thegap continuously during the winding operation. If it is desired toreduce the tensiongradually during the winding, it is merely necessaryto adjust amasss the pivot 17 of lever to increase the rate ofseparation between members 85 and 60 over that which would give theconstant tension. Conversely, if it is desired to increase the tensionduring winding the adjustment is set to reduce the rate of separation.

In case the threads should break or it should become exhausted from thepackage or other source supplying it during the winding of the package5, or in case the package 5 becomes full, the arm All is swung in aclockwise direction into contact with terminal Ma and with theprojections 43 of the wheel 42. The circuit in Figure 4 shows that uponclosing the circuit at Ma the coil H2 is energized. Energization of coilI i2 opens contact W5, thereby de-energizing the holding coil ifit andopening contacts 96, 96a, 9! and S9, and consequently interrupting thecurrent supply to the motor and to the coil 83. De-energization of coil83 allows core 32 to be urged by spring B l in such a direction as toswing lever '55 in a counterclockwise direction, which in turn withdrawsmember 68 to its maximum displacement from member 85. This reduces themagnetic influence upon elements 6i to a negligible amount so they donot acquire a set magnetism upon stopping of the machinev In addition,the latch 28 is lifted to release lug 2! which allows spring to applythe brake 25. These several functions all occur substantiallysimultaneously when the arm ts is swung into stopping position. Afterthe condition has been remedied, the machine may be started as indicatedhereinbefore.

In the second embodiment shown in Figures 5 to '7, certain of the partsare the same as in the embodiment of Figures 1 to 4 and parts aredesignated by the same reference characters. In this embodiment,however, the frusto-conical rotatable member 600. is secured to windinspindle 5a in a fixed manner, as by the key iii-i, and a gear H4 keyedto the shaft 3a meshes with the pinion So for driving the cam l throughgear 6b. The other rotatable member 86a has a conical external surfacecomplementary to the conical internal surface of the rotatable member68a and each of the members is provided with magnetic or magnetizableinserts Bid and 87a. As in the previous embodiment, when 65a is ofmagnetic material, elements are of magnetizable material and vice versa.In this embodiment, the member 86a is movable axially with respect tothe member 66a and this may be accomplished by means of the lever 'lSa(corresponding to it of Figures 1 to 4, but being longer in order toreach further back from the winding head) The lever 76a for rotating theyoke is provided with the cam slots H for imparting axial movement tothe member 85a is secured to the lever 76a by an adjustable clamp '35 asin the previous embodiment and the lever a is pivoted upon a stationarypart of the frame at 'l'la beyond the clamp is, thereby making lever 55aof the third class. A spring as normally urges lever 76a against cam rod19. A frame member 58a having a horizontal upper surface supports andguide lever 550, durin its swinging motion. The member 86a and the meansfor imparting axial adjustment thereto are carried upon the splincdshaft 880, in a manner analogous to that in which member 5a, is carriedupon the splined shaft 3 in the embodiment of Figures 1 to 4. The shaft88a may be provided with a worm wheel cm which meshes with a worm 94adriven by a shaft E55. This shaft may carry a plurality of worms We atspaced intervals along its length for driving a number of such windingmachines.

In this embodiment, the member 86a rotates at all times except when itis desired to shut down the entire machine including all of its windingunits for extensive repairs. However, in case of yarn breakage orexhaustion of yarn from the supply or filling of the package, the arm 40of the stop mechanism is swun into the path of the cogs on the wheel 42,thereby lifting the segment 2d, disconnecting the latch 21 and 28 andapplying the brake 26 to stop the winding spindle. Such stoppage, asstated, does not stop the rotatable member 8611 and this system ofstopping is of advantage when a number of machines are driven from acommon power supply since it enables one machine to be stopped forreplacement of a package, replacement of supply, or tying of broken endswithout shutting'down adjacent winding spindles. After the cause for themomentary stoppage is corrected, the operator merely releases the brakeand sets the latch 21 and 28 to start the spindle again. As in theprevious embodiment, one of the rotatable members, 86a in this instance,is shifted axially with respect to the other a throughout the winding ofthe package in order to control the tension during winding. As in theprevious embodiment, this tension may remain constant or it may bevaried in a predetermined manner. This embodiment also is adapted totake yarn from any source of supply, and particularly those mentionedhereinabove in connection with Figures 1 to 4, such as an up-twister forproducing uniform twist by virtue of the constant speed of take-up, froma continuous spinning machine, or even from a stationary package. Thisembodiment has also the additional advantage over that of Figures 1 to 4in that the rotatable member 86a shifted is not in engagement at itsperiphery with other driv-- ing elements as member Gil was engaged withpinion 6a of the embodiments of Figures 1 to 4.

In the embodiment of Figures 8 and 9, the construction of the embodimentin Figures 5 to 7 is further modified in that a magnetic clutch orinterconnection is provided between the gear 6b and the cam l. Themagnetic coupling therebetween comprises concentric cylindrical members,one 601) surrounding the other 86b. Member 86b is fixedly secured to ashaft H6 upon which the gear 61) is mounted for rotation therewith. Themember 60bis mounted for axial mo-, tion relative to 86b in a mannersimilar to the corresponding internal cone of the embodiment of Figures5 to 7 and the disc 69 of Figures 1 to 4. The yoke 13 provided with thecam slots H in this instance is connected by an upwardly extending lever16b reciprocably guided through a bore in a 111g ill secured to theframe and normally urged upwardly by a spring H8 bear ing against theupper face of the lug Ill and a pin H9 secured to the lever 16b. At itsupper end, lever b is provided with a yoke I26 supporting a rotatablefollower roll i2| which bears against the under-surface of a cam I22having the form of a wedge and secured, as more particularly shown inFigure 9, to the lever 16a which operates the means for moving themember 86a axially. A fixed plate E23 provided above the cam I22 servesto guide the lever 16a, and the cam I22. In this embodiment, it will beseen that as the package builds up member 86a shifts axially relative tomember Eta. This serves to' control the tension and the speed of windingof the yarn upon the spindle. In addition, however,

stirs :membe'rtflb :is moved; axiallyrpreierably :in .rzisuchra mannerasto reduce the overlap between :ithe' elements-261:1) (magnetic or manetizable) with iirespectgto' the elements til/lb imagnetizable x01magnetic). :As the roverlap' decrease the slip between the members 861and 60b gradually .i'inerea'sesaso that the frequency of the traverse.guide iper revolutionucf spindle rotation is .changedduring thebuild-mp of the packa The lower surface of cam I22 can be preselected togive any. desired {change in frequency. In one preferred instance, it isshaped in such a man ner that the frequency of the traverse guidedecreases at the proper rate to maintain a constant helix angle betweenthe guidings in adjacent superimposed layers for the purpose ofimproving fluid flow through the package in cases where it is desired tosubject the final Wound package The provision of the magnetic clutch ofthe present invention makes 'it possible to vary the angle in anypredetermined manner or to maintain it constantlthroughout .suchwinding. 1 As in the other embodiments, that of Figures 8 and 9 isadapted to serve as the take-up for yarns proceeding from a continuousspinning machine, from an up-twister, or from any other source ofsupply, and especially those which necessarily deliver the yarn at aconstant rate of speed, or in which it is desirable that the take-upwithdraw the yarn at a constant rate of speed.

Although the various specific forms of magnetic clutch members are shownin specific relationships, it is to be understood that any one of theforms, that is, concentric cylinders, concentric cones, and coaxialdiscs, can be used in any relationship desired. In general, the amountof axial movement between the members of the magnetic clutch during thebuilding of the package may be as low as 0.02 inch, or as high as A to/2 inch, the lower figures being commonly employed with the plate typeor cone type memhere as in the embodiments of Figures 1 to '7, whereassomewhat great r axial displacement may be found necessary with thecylindrical relationship shown in the embodiment of Figures 8 and Whenserving as a take-up for yarn fed to the device at constant speed, asfrom a continuous spinning machine, the relative movement between themembers whereby the air gap is varied serves to regulate the yarntension in any desired manner, either maintaining it constant orgradually increasing or decreasing it as desired in spite the fact t atthe yarn speed is con" stant. When the device serves as a drawing off aswell as a take-up device, the variation in the air gap between themembers of the magnetic clutch serves to regulate both the yarn speedand tension. In the case of drawing yarn from an up-twister, it servesto maintain the speed of withdrawal constant so as to produce auniformly twisted yarn. This invention thus provides a winding systemwhich makes it possible to control the tension in any desired mannerthroughout the winding of the package in spite of the fact that thepackage diameter is increasing. It is to be understood that changes andvariations may be made without departing from the spirit and ;.s.cope cfth invention as d fined in theapp nd d claims.

Iclaim:

'1. A windin machine comprising a rotatable spindle 'ior receiving acarrier upon which a strand is to be Wound, a rotatable membercarrying'aanagnetizable element, a second independently rotatablecoaxial membercarrying a mag- .Jnetic element opposite the first member,'said rotatable members being relatively movable in an axial-direction,one of the members bein con- I nected to the spindle for rotatingit uponrotation of the member, stopping :means ior the machine, and meansresponsive to actuation of thestopping meansfor separating the rotatable-members 'into positions of minimum magnetic 1 interaction.

2. A-machine in accordance with claim "1 comprising a part movable inresponse to the change pendently rotatable member carrying .a mag-'netic element opposite the first member, said members being relatively-movable axially, one of the members being connected to the spindle forrotating it therewith, means for rotating the other member, means forstopping the rotating means, resilient means for urging one of themembers away from the other, means for urging said one member toward theother in opposition to the resilient means, means for initiating therotating means, and means for rendering the last-named urging meansinefiective upon operation of the stopping means.

4. A machine in accordance with claim 3 which comprises means forpredeterminedly varying the relative axial separation between themembers during winding.

5. A machine in accordance with claim 3 comprising a part movable inresponse to the diameter of the package, and means operated by saidmovable part for predeterminedly varying the axial distance between themembers during winding.

6. 'A winding machine comprising a rotatable spindle for receiving acarrier upon which a strand is to be wound, a guide for leading thestrand to the package, means for traversing the guide from end to end ofthe carrier to distribute the strand thereon during winding, drivingmeans interconnecting the spindle and the traversing means formaintaining a predetermined frequency relationship between the traverseof the guide and the angular speed of the spindle, a rotatable membercarrying a magnetizable element, a second independently rotatablecoaxial member carrying a magnetic element opposite the first member,one of the members being connected to the spindle for rotating it uponrotation of the member, means for rotating the other member, stoppingmeans for the machine, and means responsive to actuation of the stoppingmeans for separating the rotatable members into positions of minimummagnetic interaction.

'7. A machine in accordance with claim 6 comprising means automaticallyoperable during the winding for varying the distance between the membersin a predetermined relation to the diameter of the package.

8. A machine in accordance with claim 7 in which the frequency oftraverse per spindle revolution remains constant throughout the winding.

9. A machine in accordance with claim 8 in which the interconnectingdriving means comprises a second pair of independently rotatable coaxialmembers, one comprising a magnetic element and the other a magnetizableelement.

10. A machine in accordance with claim 9 comprising means automaticallyoperable during the winding for varying the axial distance between themembers of each pair in a predetermined relation to the diameter of thepackage.

11. A winding machine comprising a rotatable spindle for receiving acarrier upon which a strand is to be wound, a guide for leading thestrand to the package, a traverse frame for supporting the guide, meansfor reciprocatin the guide relative to the traverse frame, the traverseframe being swingably mounted to allow the guide to move away from thespindle as the package builds up, a rotatable member secured to thespindle for rotation therewith and carrying a magnetizable element, asecond substantially coaxially mounted and independently rotatablemember carrying a magnetic element opposite the first member, means forrotating the second member, the first rotatable member being axiallymovable relative to the second rotatable member, said machine comprisinga rotatable cam for imparting axial motion to the first member, a membersecured to the traverse frame for motion therewith, and a linkagecomprising a lever engagin the last-named member for rotating the cammember in response to a change in the package diameter.

12. A machine in accordance with claim 11 which comprises resilientmeans for urging said lever against the member carried by the traverseframe.

JOSEPH A. TRUITT.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 1,248,898 Parks Dec. 4, 19171,862,267 Honig June 7, 1932 2,237,112 Parvin Apr. 1, 1941 2,317,290McIlvried Apr. 20, 1943 2,329,027 Almy Sept. 7, 1943 2,401,982Springhorn June 11, 1946 2,415,764 Shilthius et a1 Feb. 11, 19472,436,557 Davis et al. Feb. 24, 1948 FOREIGN PATENTS Number Country Date301,928 Germany Mar. 2, 1917

